What are all the tangible ways you might measure a return on investment (ROI) in your group project?

Project:

A healthcare system is looking to find some savings in its budget and realized there are savings if they can cut down the use of paper. For example, their administrative staff spends far too much time scanning registration documents into their EHR system and/or finding lost documents that may ultimately need to be reproduced, leading to delays in patient care. Patients also get extremely frustrated when they are asked to fill out forms again. We will use a system by OnBase to help solve this issue.